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-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-computed.html26
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-invalid.html20
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-path-computed.html26
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-path-invalid.html56
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-path-shape-parsing.html57
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-path-valid.html77
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-rule-computed.html19
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-rule-invalid.html19
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-rule-valid.html19
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/clip-valid.html20
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-invalid.html35
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-position-invalid.html30
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-position-valid.html35
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-type-computed.html19
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-type-invalid.html19
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-type-valid.html18
-rw-r--r--testing/web-platform/tests/css/css-masking/parsing/mask-valid.sub.html65
17 files changed, 560 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-computed.html b/testing/web-platform/tests/css/css-masking/parsing/clip-computed.html
new file mode 100644
index 0000000000..a1a8ce1cb2
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-computed.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: getComputedStyle().clip</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#clip-property">
+<meta name="assert" content="clip computed value is as specified, with lengths made absolute.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+ #target {
+ font-size: 40px;
+ }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("clip", "auto");
+test_computed_value("clip", "rect(10px, 20px, -30px, 40px)");
+test_computed_value("clip", "rect(10px, 20px, calc(-1em + 10px), 1em)", "rect(10px, 20px, -30px, 40px)");
+test_computed_value("clip", "rect(10px, -20px, auto, auto)");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-invalid.html
new file mode 100644
index 0000000000..d8b3868903
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-invalid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip with invalid values</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#clip-property">
+<meta name="assert" content="clip supports only the grammar 'rect() | auto'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("clip", "none");
+test_invalid_value("clip", "rect(10px, 20px, 30px)");
+test_invalid_value("clip", "rect(10%, -20%, auto, auto)");
+test_invalid_value("clip", "rect(10px 20px, 30px 40px)");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-path-computed.html b/testing/web-platform/tests/css/css-masking/parsing/clip-path-computed.html
new file mode 100644
index 0000000000..00a75cdefa
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-path-computed.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Shapes Module Level 1: getComputedStyle().shapeOutside</title>
+<link rel="help" href="https://drafts.csswg.org/css-shapes/#clip-path-property">
+<meta name="assert" content="clip-path computed value is as specified.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<style>
+ #target {
+ font-size: 40px;
+ }
+</style>
+<div id="target"></div>
+<script>
+test_computed_value("clip-path", "circle(calc(10px + 0.5em) at -50% 50%)", "circle(30px at -50% 50%)");
+test_computed_value("clip-path", "circle(calc(10px - 0.5em) at 50% -50%)", "circle(0px at 50% -50%)");
+test_computed_value("clip-path", "ellipse(at 50% 50%)");
+test_computed_value("clip-path", "ellipse(60% closest-side at 50% 50%)");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-path-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-path-invalid.html
new file mode 100644
index 0000000000..6b91f74ad4
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-path-invalid.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip-path with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-path">
+<meta name="assert" content="clip-path supports only the grammar '<clip-source> | [ <basic-shape> || <geometry-box> ] | none'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("clip-path", "auto");
+test_invalid_value("clip-path", "ray(0deg)");
+
+test_invalid_value("clip-path", "inset()");
+test_invalid_value("clip-path", "inset(123)");
+test_invalid_value("clip-path", "inset(1% 2% 3% 4% 5%)");
+test_invalid_value("clip-path", "inset(round 0)");
+test_invalid_value("clip-path", "inset(0px round)");
+test_invalid_value("clip-path", "inset(0px round 123)");
+test_invalid_value("clip-path", "inset(0px round 1% 2% 3% 4% 5%)");
+test_invalid_value("clip-path", "inset(0px round / 1px)");
+test_invalid_value("clip-path", "inset(10px round -20px)");
+test_invalid_value("clip-path", "inset(30% round -40%)");
+
+test_invalid_value("clip-path", "circle(123)");
+test_invalid_value("clip-path", "circle(at)");
+test_invalid_value("clip-path", "circle(10% 20%)");
+test_invalid_value("clip-path", "circle(-10px at 20px 30px)");
+test_invalid_value("clip-path", "circle(-10% at 20% 30%)");
+test_invalid_value("clip-path", "circle(1% 2% at 0% 100%)");
+
+test_invalid_value("clip-path", "ellipse(farthest-side at)");
+test_invalid_value("clip-path", "ellipse(1% 2% top right)");
+test_invalid_value("clip-path", "ellipse(3%)");
+test_invalid_value("clip-path", "ellipse(3% at 100% 0%)");
+test_invalid_value("clip-path", "ellipse(closest-side)");
+test_invalid_value("clip-path", "ellipse(farthest-side at 100% 0%)");
+test_invalid_value("clip-path", "ellipse(10% -20% at 30% 40%)");
+test_invalid_value("clip-path", "ellipse(-50px 60px at 70% 80%)");
+
+test_invalid_value("clip-path", "polygon(1%)");
+
+test_invalid_value("clip-path", "unknown-box");
+
+test_invalid_value("clip-path", 'path(abc, "m 20 0 h -100 z")');
+test_invalid_value("clip-path", 'path(nonzero)');
+test_invalid_value("clip-path", 'path("m 20 0 h -100", nonzero)');
+
+
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-path-shape-parsing.html b/testing/web-platform/tests/css/css-masking/parsing/clip-path-shape-parsing.html
new file mode 100644
index 0000000000..5e8eb8e117
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-path-shape-parsing.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<link rel="help" href="https://drafts.csswg.org/css-shapes-2/#shape-function">
+<meta name="assert" content="clip-path supports the full shape() grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+// basic
+test_valid_value("clip-path", "shape(from 0px 0px, line to 10px 10px)");
+test_valid_value("clip-path", "shape(evenodd from 0px 0px, line to 10px 10px)");
+test_valid_value("clip-path", "shape(nonzero from 0px 0px, line to 10px 10px)", "shape(from 0px 0px, line to 10px 10px)");
+test_valid_value("clip-path", "shape( from 0px 0px, line to 10px 10px )", "shape(from 0px 0px, line to 10px 10px)");
+test_valid_value("clip-path", "shape(from 1em 50%, line to 10px 10px)");
+test_valid_value("clip-path", "shape(EvenOdd from 0px 0Px, CLOSE)", "shape(evenodd from 0px 0px, close)");
+test_valid_value("clip-path", "shape(from 1ch 50px, line to 10rem 10vh)");
+test_valid_value("clip-path", "shape(from 1ch -50px, line to -10% 12px)");
+
+// segment types
+test_valid_value("clip-path", "shape(from 10px 10px, move by 10px 5px, line by 20px 40%, close)");
+test_valid_value("clip-path", "shape(from 10px 10px, hline by 10px, vline to 5rem)");
+test_valid_value("clip-path", "shape(from 10px 10px, vline by 5%, hline to 1vw)");
+test_valid_value("clip-path", "shape(from 10px 10px, curve to 50px 20px via 10rem 1%)");
+test_valid_value("clip-path", "shape(from 10px 10px, curve to 50px 20px via 10rem 1px 20vh 1ch)");
+test_valid_value("clip-path", "shape(from 10px 10px, curve by 50px 20px via 10rem 1px 20vh 1ch)");
+test_valid_value("clip-path", "shape(from 10px 10px, smooth to 50px 20px via 10rem 1%)");
+test_valid_value("clip-path", "shape(from 10px 10px, smooth to 50px 1pt)");
+test_valid_value("clip-path", "shape(from 10px 10px, arc to 50px 1pt of 10px 10px)", "shape(from 10px 10px, arc to 50px 1pt of 10px)");
+test_valid_value("clip-path", "shape(from 10px 10px, arc to 50px 1pt of 10px 10px small rotate 0deg)", "shape(from 10px 10px, arc to 50px 1pt of 10px)");
+test_valid_value("clip-path", "shape(from 10% 1rem, arc to 50px 1pt of 20% cw large rotate 25deg)", "shape(from 10% 1rem, arc to 50px 1pt of 20% cw large rotate 25deg)");
+test_valid_value("clip-path", "shape(evenodd from 0px 0px, close)");
+
+// nonsense
+test_invalid_value("clip-path", "shape(evenodd from 0px 0px, close path)");
+test_invalid_value("clip-path", "shape(nonzero, from 0px 0px, line to 10px 10px)");
+test_invalid_value("clip-path", "shape(from 10px 10px, curve to 50px 20px via 10rem)");
+test_invalid_value("clip-path", "shape(from 10px 10px, curve to 50px 20px via 10rem 1% 12px)");
+test_invalid_value("clip-path", "shape(from 10px 10px, hline byy 10px, vline to 5rem)");
+test_invalid_value("clip-path", "shape(from 10px 10px, vline by 5% hline by 1vw");
+test_invalid_value("clip-path", "shape(from 10px 10px, smooth to 50px 20px via 10rem)");
+test_invalid_value("clip-path", "shape(from 10px 10px, smooth to 50px 20px via 10rem 2px 2pt)");
+test_invalid_value("clip-path", "shape()");
+test_invalid_value("clip-path", "shape(from)");
+test_invalid_value("clip-path", "shape(from 0px)");
+test_invalid_value("clip-path", "shape(from 0px 20px,)");
+test_invalid_value("clip-path", "shape(close)");
+test_invalid_value("clip-path", "shape(nonzero, close)");
+test_invalid_value("clip-path", "shape(from 0px 10px)");
+test_invalid_value("clip-path", "shape(allkindsofnonsense)");
+test_invalid_value("clip-path", "shape(arc)");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-path-valid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-path-valid.html
new file mode 100644
index 0000000000..ec6ac5ae9b
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-path-valid.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip-path with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-path">
+<meta name="assert" content="clip-path supports the full grammar '<clip-source> | [ <basic-shape> || <geometry-box> ] | none'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("clip-path", "none");
+
+// <basic-shape>
+test_valid_value("clip-path", "inset(100%)");
+test_valid_value("clip-path", "inset(0 1px)", "inset(0px 1px)");
+test_valid_value("clip-path", "inset(0px 1px 2%)");
+test_valid_value("clip-path", "inset(0px 1px 2% 3em)");
+test_valid_value("clip-path", "inset(0px round 100%)");
+test_valid_value("clip-path", "inset(0px round 0 1px)", "inset(0px round 0px 1px)");
+test_valid_value("clip-path", "inset(0px round 0px 1px 2%)");
+test_valid_value("clip-path", "inset(0px round 0px 1px 2% 3em)");
+test_valid_value("clip-path", "inset(10px round 20% / 0px 1px 2% 3em)");
+
+test_valid_value("clip-path", "circle()", "circle(at 50% 50%)");
+test_valid_value("clip-path", "circle(1px)", "circle(1px at 50% 50%)");
+test_valid_value("clip-path", "circle(closest-side)", "circle(at 50% 50%)");
+test_valid_value("clip-path", "circle(at 10% 20%)");
+test_valid_value("clip-path", "circle(farthest-side at center top)", "circle(farthest-side at 50% 0%)");
+test_valid_value("clip-path", "circle(4% at top right)", "circle(4% at 100% 0%)");
+
+test_valid_value("clip-path", "ellipse()", "ellipse(at 50% 50%)");
+test_valid_value("clip-path", "ellipse(1px closest-side)", "ellipse(1px closest-side at 50% 50%)");
+test_valid_value("clip-path", "ellipse(at 10% 20%)");
+test_valid_value("clip-path", "ellipse(closest-side closest-side at 10% 20%)", "ellipse(at 10% 20%)");
+test_valid_value("clip-path", "ellipse(farthest-side 4% at bottom left)", "ellipse(farthest-side 4% at 0% 100%)");
+
+test_valid_value("clip-path", "polygon(1% 2%)");
+test_valid_value("clip-path", "polygon(nonzero, 1px 2px, 3em 4em)", "polygon(1px 2px, 3em 4em)");
+test_valid_value("clip-path", "polygon(evenodd, 1px 2px, 3em 4em, 5pt 6%)");
+
+// New supported shape in [css-shapes-2]
+// https://drafts.csswg.org/css-shapes-2/#supported-basic-shapes
+test_valid_value("clip-path", 'path("m 20 0 h -100")');
+test_valid_value("clip-path", 'path(evenodd, "M 20 20 h 60 v 60 h -60 Z M 30 30 h 40 v 40 h -40 Z")');
+test_valid_value("clip-path",
+ 'path(nonzero, "M20,20h60 v60 h-60z M30,30 h40 v40 h-40z")',
+ 'path("M 20 20 h 60 v 60 h -60 Z M 30 30 h 40 v 40 h -40 Z")');
+// See https://github.com/w3c/fxtf-drafts/issues/392. If empty path string,
+// Blink serializes it as none, but Gecko serializes as path("").
+test_valid_value("clip-path", 'path(" ")', ["none", 'path("")']);
+test_valid_value("clip-path", 'path(evenodd, "")', ["none", 'path(evenodd, "")']);
+
+// <geometry-box>
+test_valid_value("clip-path", "border-box");
+test_valid_value("clip-path", "padding-box");
+test_valid_value("clip-path", "content-box");
+test_valid_value("clip-path", "margin-box");
+test_valid_value("clip-path", "fill-box");
+test_valid_value("clip-path", "stroke-box");
+test_valid_value("clip-path", "view-box");
+
+// basic-shape> <geometry-box>
+test_valid_value("clip-path", "circle(7% at 8% 9%) border-box");
+
+// <geometry-box> basic-shape>
+test_valid_value("clip-path", "border-box circle(7% at 8% 9%)");
+
+// <clip-source>
+test_valid_value("clip-path", "url(https://example.com/)", ["url(https://example.com/)", "url(\"https://example.com/\")"]);
+test_valid_value("clip-path", "url(\"https://example.com/\")", ["url(https://example.com/)", "url(\"https://example.com/\")"]);
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-rule-computed.html b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-computed.html
new file mode 100644
index 0000000000..533b7dc0f0
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-computed.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: getComputedStyle().clipRule</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-rule">
+<meta name="assert" content="clip-rule computed value is as specified.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("clip-rule", "nonzero");
+test_computed_value("clip-rule", "evenodd");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-rule-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-invalid.html
new file mode 100644
index 0000000000..4f4883e8a0
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-invalid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip-rule with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-rule">
+<meta name="assert" content="clip-rule supports only the grammar 'nonzero | evenodd'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("clip-rule", "auto");
+test_invalid_value("clip-rule", "1");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-rule-valid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-valid.html
new file mode 100644
index 0000000000..fe94f8f6c5
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-rule-valid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip-rule with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-rule">
+<meta name="assert" content="clip-rule supports the full grammar 'nonzero | evenodd'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("clip-rule", "nonzero");
+test_valid_value("clip-rule", "evenodd");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/clip-valid.html b/testing/web-platform/tests/css/css-masking/parsing/clip-valid.html
new file mode 100644
index 0000000000..d60802b897
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/clip-valid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing clip with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#clip-property">
+<meta name="assert" content="clip supports the full grammar 'rect() | auto'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("clip", "auto");
+test_valid_value("clip", "rect(10px, 20px, -30px, 40px)");
+test_valid_value("clip", "rect(10px, -20px, auto, auto)");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/mask-invalid.html
new file mode 100644
index 0000000000..367049cf19
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-invalid.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask with invalid values</title>
+<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask">
+<meta name="assert" content="mask supports only the '<mask-layer>#' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value('mask', 'none linear-gradient(to 0% 0%, rgb(0, 0, 0), rgb(0, 0, 255))');
+test_invalid_value('mask', 'none alpha luminance');
+test_invalid_value('mask', 'linear-gradient(to 0% 0%, rgb(0, 0, 0), rgb(0, 0, 255)) url("https://example.com/")');
+
+test_invalid_value('mask', '1px 2px 3px');
+test_invalid_value('mask', '1px 2px 3px 4px');
+test_invalid_value('mask', '1px 2px / contain / cover');
+
+test_invalid_value('mask', 'repeat-y repeat-x');
+
+test_invalid_value('mask', 'stroke-box no-clip view-box');
+
+test_invalid_value('mask', 'border-box view-box padding-box');
+
+test_invalid_value('mask', 'no-clip border-box content-box');
+
+test_invalid_value('mask', 'content-box stroke-box no-clip');
+
+test_invalid_value('mask', 'add intersect');
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-position-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/mask-position-invalid.html
new file mode 100644
index 0000000000..c246a1e795
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-position-invalid.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask-position with invalid values</title>
+<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-position">
+<meta name="assert" content="mask-position supports only the '<position>#' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("mask-position", "auto");
+test_invalid_value("mask-position", "1px 2px 3px");
+test_invalid_value("mask-position", "left right");
+test_invalid_value("mask-position", "bottom 10%");
+test_invalid_value("mask-position", "bottom 10% top 20%");
+
+test_invalid_value("mask-position", "center left 1px");
+test_invalid_value("mask-position", "center top 2px");
+test_invalid_value("mask-position", "right 3% center");
+test_invalid_value("mask-position", "left 4px top");
+test_invalid_value("mask-position", "right top 5px");
+test_invalid_value("mask-position", "bottom 6% center");
+test_invalid_value("mask-position", "bottom 7% left");
+test_invalid_value("mask-position", "bottom right 8%");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-position-valid.html b/testing/web-platform/tests/css/css-masking/parsing/mask-position-valid.html
new file mode 100644
index 0000000000..f2d2c4a8d1
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-position-valid.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask-position with valid values</title>
+<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-position">
+<meta name="assert" content="mask-position supports the full '<position>#' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("mask-position", "10%");
+test_valid_value("mask-position", "right 30% top 60px");
+test_valid_value("mask-position", "-20% -30px");
+test_valid_value("mask-position", "30px center", "30px");
+test_valid_value("mask-position", "40px top");
+test_valid_value("mask-position", "bottom 10% right 20%", "right 20% bottom 10%");
+test_valid_value("mask-position", "bottom right", "right bottom");
+test_valid_value("mask-position", "center 50px");
+test_valid_value("mask-position", "center bottom", "bottom");
+test_valid_value("mask-position", "center left", "left");
+test_valid_value("mask-position", "left");
+test_valid_value("mask-position", "left bottom");
+test_valid_value("mask-position", "right 40%");
+test_valid_value("mask-position", "top");
+test_valid_value("mask-position", "top center", "top");
+test_valid_value("mask-position", "center", "center");
+
+test_valid_value("mask-position", "bottom left, right 20%", "left bottom, right 20%");
+test_valid_value("mask-position", "top, center, left");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-type-computed.html b/testing/web-platform/tests/css/css-masking/parsing/mask-type-computed.html
new file mode 100644
index 0000000000..0fd02c8b4f
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-type-computed.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: getComputedStyle().maskType</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-type">
+<meta name="assert" content="mask-type computed value is as specified.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("mask-type", "luminance");
+test_computed_value("mask-type", "alpha");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-type-invalid.html b/testing/web-platform/tests/css/css-masking/parsing/mask-type-invalid.html
new file mode 100644
index 0000000000..56451d2879
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-type-invalid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask-type with invalid values</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-type">
+<meta name="assert" content="mask-type supports only the grammar 'luminance | alpha'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("mask-type", "auto");
+test_invalid_value("mask-type", "luminance alpha");
+test_invalid_value("mask-type", "alpha, luminance");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-type-valid.html b/testing/web-platform/tests/css/css-masking/parsing/mask-type-valid.html
new file mode 100644
index 0000000000..31a528381a
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-type-valid.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask-type with valid values</title>
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-type">
+<meta name="assert" content="mask-type supports the full grammar 'luminance | alpha'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("mask-type", "luminance");
+test_valid_value("mask-type", "alpha");
+</script>
+</body>
+</html>
diff --git a/testing/web-platform/tests/css/css-masking/parsing/mask-valid.sub.html b/testing/web-platform/tests/css/css-masking/parsing/mask-valid.sub.html
new file mode 100644
index 0000000000..c6e2c28af5
--- /dev/null
+++ b/testing/web-platform/tests/css/css-masking/parsing/mask-valid.sub.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Masking Module Level 1: parsing mask with valid values</title>
+<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask">
+<meta name="assert" content="mask supports the full '<mask-layer>#' grammar.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+// <mask-layer> = <mask-reference> || <position> [ / <bg-size> ]? || <repeat-style> ||
+// <geometry-box> || [ <geometry-box> | no-clip ] || <compositing-operator> || <masking-mode>
+
+// <mask-reference> = none | <image> | <mask-source>
+test_valid_value('mask', 'none');
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue)');
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) luminance');
+test_valid_value('mask', 'url("https://{{host}}/")');
+
+// <position> [ / <bg-size> ]?
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) 1px 2px');
+test_valid_value('mask', 'url("https://{{host}}/") 1px 2px / contain');
+
+// <repeat-style> = repeat-x | repeat-y | [repeat | space | round | no-repeat]{1,2}
+test_valid_value('mask', 'repeat-y');
+
+// <geometry-box> = <shape-box> | fill-box | stroke-box | view-box
+// <shape-box> = <box> | margin-box
+// <box> = border-box | padding-box | content-box
+test_valid_value('mask', 'border-box', 'none');
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) padding-box');
+test_valid_value('mask', 'content-box');
+test_valid_value('mask', 'margin-box');
+test_valid_value('mask', 'url("https://{{host}}/") fill-box');
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) stroke-box');
+test_valid_value('mask', 'view-box');
+
+// [ <geometry-box> | no-clip ]
+test_valid_value('mask', 'no-clip');
+
+// <compositing-operator> = add | subtract | intersect | exclude
+test_valid_value('mask', 'url("https://{{host}}/") add', 'url("https://{{host}}/")');
+test_valid_value('mask', 'subtract');
+test_valid_value('mask', 'url("https://{{host}}/") intersect');
+test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) exclude');
+
+// <masking-mode> = alpha | luminance | auto
+test_valid_value('mask', 'alpha');
+test_valid_value('mask', 'url("https://{{host}}/") alpha');
+
+// <mask-layer> = <mask-reference> || <position> [ / <bg-size> ]? || <repeat-style> ||
+// <geometry-box> || [ <geometry-box> | no-clip ] || <compositing-operator> || <masking-mode>
+test_valid_value('mask', 'intersect no-clip space round 1px 2px / contain stroke-box linear-gradient(to left bottom, red, blue) luminance', 'linear-gradient(to left bottom, red, blue) luminance 1px 2px / contain space round stroke-box no-clip intersect');
+test_valid_value('mask', 'intersect no-clip space round 1px 2px / contain view-box, stroke-box linear-gradient(to left bottom, red, blue) luminance', '1px 2px / contain space round view-box no-clip intersect, linear-gradient(to left bottom, red, blue) luminance stroke-box');
+
+// Earlier versions of the mask shorthand always required a <mask-reference>.
+// To avoid unnecessarily losing test coverage, keep one of the test cases from back then.
+test_valid_value('mask', 'none alpha', 'alpha');
+
+</script>
+</body>
+</html>